From: Jakub Jelinek <jakub@redhat.com>
To: Suparna Bhattacharya <suparna@in.ibm.com>
Cc: linux-aio@kvack.org, linux-kernel@vger.kernel.org,
lse-tech@lists.sourceforge.net
Subject: Re: Fw: Writeup on AIO design (uploaded) - corrected url
Date: Wed, 30 Jan 2002 10:46:27 -0500 [thread overview]
Message-ID: <20020130104627.N10157@devserv.devel.redhat.com> (raw)
In-Reply-To: <20020130205115.B1864@in.ibm.com>
In-Reply-To: <20020130205115.B1864@in.ibm.com>; from suparna@in.ibm.com on Wed, Jan 30, 2002 at 08:51:15PM +0530
On Wed, Jan 30, 2002 at 08:51:15PM +0530, Suparna Bhattacharya wrote:
>
> Oops, oops, oops, I mispelt the website.
> It should have been:
>
> http://lse.sourceforge.net/io/aionotes.txt
a. User level threads
- glibc approach (one user thread per operation ?)
poor scalability, performance
Glibc uses a pool of threads, not one thread per operation.
All requests against a single file descriptor are served sequentially,
while for different fds they are served by different threads unless aio
thread limit has been reached, in which case they are queued too.
b. Pool of threads
- have a pool of threads servicing an aio request queue for the
task - tradeof between degree of concurrency/utilization and
resource consumption.
Jakub
next prev parent reply other threads:[~2002-01-30 15:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-30 15:21 Fw: Writeup on AIO design (uploaded) - corrected url Suparna Bhattacharya
2002-01-30 15:46 ` Jakub Jelinek [this message]
2002-01-30 16:00 ` Suparna Bhattacharya
2002-01-30 16:03 ` Jakub Jelinek
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